Brown trout and smallmouth bass in a freshwater pond with a water temperature of 55 degrees Fahrenheit and a pH of 6.5.

Antelope, prairie dogs, and purple coneflowers in Nebraska during the year 2018.

Streptococcus bacteria and staphylococcus bacteria along with Penicillium fungus growing on protein agar in a dark incubator set at 90 degrees Fahrenheit and 88% humidity.

Match the descriptions with the appropriate cycles.

Autotrophs, such as plants, must be present for these cycles to continue.

Match the descriptions with the appropriate cycle.

The cycle is primarily the result of abiotic processes

Match the descriptions with the appropriate cycle.

The process depends on bacteria.

Match the descriptions with the appropriate cycles.

These cycles are primarily the result of biotic processes.

Match the descriptions with the appropriate cycle or cycles. You must include all the possible answers to receive credit.

The sun is necessary for the process to occur.

Match the descriptions with the appropriate cycles. You must include all the possible answers to receive credit.

These cycles would stop if all life would go extinct.

All organisms require the element nitrogen. Identify the biological molecule that contains nitrogen.

The process when water moves over the surface of the land and flows into a body of water such as a river.

Identify the process that occurs during the nitrogen cycle that makes nitrogen directly accessible to plants.

Identify the process of the water cycle that is biotic.

This process, dependent on bacteria, releases nitrogen gas back into the atmosphere.

This type of ecological succession starts with no soil.

Other than photosynthesis, what biotic process is vital to the carbon cycle?

Legumes are a group of plants that form a symbiotic relationship with nitrogen fixing bacteria to get the nitrogen they need. Name a plant that is a legume.

This general group of consumers plays an important role in the carbon and nitrogen cycles by releasing the elements from wastes and dead organisms.

What part of the water cycle does this picture show?